Extension Of Basic Cascade - Parameter Group 25** Control Mode - Danfoss VLT Series Operating Instructions Manual

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VLT Operating Instructions

1.4.1 Extension of Basic Cascade - Parameter group 25** control mode

Use of the extended cascade option MCO 101 as an extension of the built-in basic cascade in the drive
In applications already controlled by the built-in cascade controller in group 25**, the option card can be used to extend the numbers of relays for cascade
control. For instance if a new pump is added to the system. It can also be used in case it is wanted to alternate the lead pump in systems with more than
2 drives, which is the limit for the basic cascade without MCO 101 option installed.
Install the option in slot B, enable the Basic cascade in par. 27-10. Please refer to AQUA programming guide for parameter group 25** settings.
Example: Electrical wiring diagram for the external equipment needed for systems with alternating lead pump of 4 pumps using Basic cascade and MCO
101 as relay extension.
Illustration 1.5: Control circuit alternating lead pump (4 pumps).
Illustration 1.6: Mains circuit alternating lead pump (4 pumps).
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MI.38.C3.02 - VLT is a registered Danfoss trademark
1 Extended and Advanced Cascade Controller
Option
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